updating package.json for v1.21.0 release, [skip-ci]
updating package.json for v1.21.0 release, [skip-ci]

gboushey/frontend,thecoolestguy/frontend,gabycampagna/frontend,dartajax/frontend,jrjohnson/frontend,ilios/frontend,ilios/frontend,jrjohnson/frontend,stopfstedt/frontend,gabycampagna/frontend,gboushey/frontend,djvoa12/frontend,stopfstedt/frontend,djvoa12/frontend,dartajax/frontend,thecoolestguy/frontend